Patio Door Handle

A home owner from Hibbing Minnesota says:
I'd like to replace this patio door handle with one that has a key.
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Tom from SWISCO responded:

Sure thing! You can actually keep your existing handle set and use an 82-310 key cylinder. That looks like it will be compatible with your current setup, just make sure the punch-out in your outer handle is aligned properly with the slot in the internal mortise. If it is, then you're good to go.

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